Camera filter module

ABSTRACT

Disclosed herein is a camera lens module. The camera lens module may include a base in which a lens barrel is placed, an auto-focusing driving unit disposed in parallel to the first side surface of the base in such a way as to face the first side surface and disposed to face the lens barrel, and an optical element driving unit disposed in parallel to a second side surface placed in a direction opposite the first side surface, disposed to face the lens barrel, and disposed to stand opposite to the auto-focusing driving unit.

BACKGROUND OF THE INVENTION

1. Technical Field

Embodiments of the present invention relate to a small-sized camera lensmodule mounted on the front or rear of the main body of a mobilecommunication terminal and used in various photographing modes.

2. Description of the Related Art

Recently, at least one light, thin, short, and small camera lens moduleis adopted in a mobile communication terminal, such as a tablet PC orsmart phone that is generalized with the recent development of a mobilecommunication technology. In particular, there is a user's high-capacityand high-performance demand for the camera lens module adopted in themobile communication terminal. Furthermore, the camera lens module isbeing developed in the direction advantageous for a small size whilemaintaining its high capacity and high performance.

A small camera lens module adopted in a mobile communication terminal isequipped with an auto-focusing function and a digital zoom function andalso equipped with a stabilizer function so that it is faithful to itscamera function. In general, a known camera lens module includes a lens,a lens driving unit configured to move the lens in the direction of theoptical axis and provide a movable force for focus control, and an imagesensor configured to photograph light incident through the lens andconvert the photographed light into an image signal. The camera lensmodule is configured to perform focusing on a subject for photographingby automatically controlling the distance between the lens and the imagesensor.

The lens driving unit of the camera lens module that implementsauto-focusing may be divided into a voice coil motor (VCM) type using aninteraction principle between a magnetic field and an electric field andan encoding type in which the location of the lens is automaticallycontrolled in response to the detection of the sensor. In a method ofimplementing a focusing function in the VCM type camera lens module, aVCM is chiefly used as a driving source. The VCM includes a magnetconfigured to generate a magnetic force and a coil supplied with anelectric current and moves a lens barrel by a force generated by theinteraction between an electric field and a magnetic field. Likewise,the encoding type camera lens module includes a magnet and a coilsupplied with an electric current and provides a movable force.

For example, a conventional small-sized auto-focusing camera lens modulemounted on a mobile communication terminal is disclosed in “KoreanPatent Application No. 2010-106811”, “Korean Patent Application No.2009-83613”, “Korean Patent Application No. 2012-85890”, and “KoreanPatent Application No. 2010-71948.”

SUMMARY OF THE INVENTION

However, as a mobile communication terminal gradually becomeslight-weight and slim while maintaining high performance, a camera lensmodule mounted on the main body of the terminal also needs to be reducedin size while maintaining high performance.

The disposition of a driving unit is very important in a reduction inthe size of the camera lens module. An auto-focusing driving unit isessentially mounted on the driving unit included in the camera lensmodule. An optical element driving unit, a shutter driving unit, or anoptical image stabilizer driving unit may be additionally configured inthe camera lens module depending on performance of a terminal. If suchdriving units are reduced in size and the small-sized driving units aredisposed in empty spaces of the camera lens module, a reduction in thesize of the camera lens module can be achieved.

Accordingly, an embodiment of the present invention is directed to theprovision of a camera lens module advantageous for a small-size design.

Furthermore, an embodiment of the present invention is intended toprovide a camera lens module including an optical element driving unitadvantageous for a small-size design.

Furthermore, an embodiment of the present invention is intended toprovide a camera lens module including an optical element assemblyadvantageous for a small-size design.

Furthermore, an embodiment of the present invention is intended toprovide a camera lens module advantageous for a small-sized driving unitby disposing an optical element driving unit in such a way as to face anauto-focusing driving unit or an optical image stabilizer driving uniton the basis of a lens barrel.

Furthermore, an embodiment of the present invention is directed to theprovision of a camera lens module capable of adopting a multi-filter,photographing in various photographing modes, and an easy mode change.

In accordance with an embodiment of the present invention, a camera lensmodules includes a base in which a lens barrel is placed, anauto-focusing driving unit disposed in parallel to the first sidesurface of the base in such a way as to face the first side surface anddisposed to face the lens barrel, and an optical element driving unitdisposed in parallel to a second side surface placed in a directionopposite the first side surface in an upright state in such a way as toface the second side surface, disposed to face the lens barrel, anddisposed to stand opposite to the auto-focusing driving unit.

Furthermore, in accordance with an embodiment of the present invention,a camera lens modules includes a base in which a lens barrel is placed,an auto-focusing driving unit disposed in parallel to the first sidesurface of the base in such a way as to face the first side surface anddisposed to face the lens barrel, and an optical element driving unitdisposed in parallel to a second side surface placed in a directionperpendicular to the first side surface in an upright state in such away as to face the second side surface, disposed to face the lensbarrel, and disposed to stand opposite to the auto-focusing drivingunit.

Furthermore, in accordance with an embodiment of the present invention,optical image stabilizer driving units are disposed in parallel to thirdand fourth side surfaces that respectively stand opposite to the firstand the second side surfaces in an upright state, or one optical imagestabilizer driving unit is disposed in parallel to any one of the thirdand the fourth side surfaces in an upright state in such a way as toface any one of the third and the fourth side surfaces.

Furthermore, in accordance with an embodiment of the present invention,a camera lens modules includes a base in which a lens barrel is placed,an auto-focusing driving unit disposed in the first corner area of thebase in such a way as to upright face the lens barrel, and an opticalelement driving unit disposed in a second corner area placed in adirection diagonally opposite the first corner area in such a way as toupright face the lens barrel and disposed to stand opposite to theauto-focusing driving unit.

Furthermore, in accordance with an embodiment of the present invention,a camera lens modules includes a base in which a lens barrel is placed,an auto-focusing driving unit disposed in a first corner area of thebase in such a way as to upright face the lens barrel, and an opticalelement driving unit disposed in a second corner area placed in adirection perpendicular to the first corner area in such a way as toupright face the lens barrel and disposed to be adjacent to theauto-focusing driving unit.

Furthermore, in accordance with an embodiment of the present invention,optical image stabilizer driving units are respectively disposed to facethe lens barrel in third and fourth corner areas respectively disposedto stand opposite to the first and the second corner areas, or oneoptical image stabilizer driving unit is disposed in any one of thethird and the fourth corner areas.

Furthermore, in accordance with an embodiment of the present invention,a camera lens module includes an optical element base, an opticalelement driving unit configured in a flat plate form, disposed to faceone side surface of the camera lens module in parallel, and uprightdisposed in the optical element base in a direction of an optical axis,and an optical element assembly configured to comprise an opticalelement unit disposed in parallel to a top surface of the opticalelement base and rotated in conjunction with the optical element drivingunit.

Furthermore, the optical element driving unit in accordance with anembodiment of the present invention includes a movable magnet configuredto linearly move in parallel to the one side surface in the state inwhich the optical element driving unit has faced the one side surface.

Furthermore, the optical element driving unit in accordance with anembodiment of the present invention includes one or a plurality of yokesmounted on the optical element base and made of a magnetic material, acoil mounted on the optical element base and disposed in parallel to theyokes, a flat plate-shaped movable magnet separated from the coil,disposed in parallel to the coil in such a way as to face the coil, anddisposed to linearly move over the coil when an electric current isapplied to the coil, and one or a plurality of guides provided inspecific regions of the optical element base and configured to smooth amovement of the movable magnet.

Furthermore, the movable magnet in accordance with an embodiment of thepresent invention moves over the guides in a direction perpendicular tothe direction of the optical axis.

Furthermore, the yokes in accordance with an embodiment of the presentinvention include first and second yokes symmetrically disposed inparallel, mounted in the direction of the optical axis, and disposed toface the movable magnet.

Furthermore, the guides in accordance with an embodiment of the presentinvention include first and second guides symmetrically disposed on bothsides of the first and the second yokes.

Furthermore, the first guide in accordance with an embodiment of thepresent invention is configured in pairs and includes at least one ballbearing, and the second guide is disposed symmetrically to the firstguides based on the coil and includes at least one ball bearing.

Furthermore, the camera lens module in accordance with an embodiment ofthe present invention further includes a magnet transfer housing onwhich the movable magnet is mounted. The magnet transfer housing isconfigured in a flat plate form and disposed to move over the coil alongwith the movable magnet with a gap by the guides.

Furthermore, the magnet transfer housing in accordance with anembodiment of the present invention further includes a coupling pinextended in the direction of the optical axis in a top corner on oneside of the magnet transfer housing so that the magnet transfer housingis coupled to the optical element unit. The optical element unit isdisposed to rotate around a hinge when the magnet transfer housinglinearly reciprocates.

Furthermore, at least one proximity sensor is disposed in the internalspace of the coil or near the coil and configured to detect the locationof the movable magnet.

Furthermore, the optical element unit in accordance with an embodimentof the present invention includes a filter blade configured to includeone or a plurality of filters.

Furthermore, the filter in accordance with an embodiment of the presentinvention may include a multi-filter configured to include a visible rayfilter and an infrared filter disposed in parallel to the visible rayfilter.

Furthermore, the optical element unit in accordance with an embodimentof the present invention includes a filter blade configured to include ablade having a filter or shutter function.

Furthermore, in accordance with an embodiment of the present invention,a camera lens modules includes a base, one or a plurality of yokesmounted on one side surface of the base, a coil mounted on the base anddisposed to face the yoke, a flat plate-shaped movable magnet disposedin parallel to the coil in such a way as to face the coil and disposedto linearly move over the coil when an electric current is applied tothe coil, and a plurality of guides provided between the movable magnetand the coil and configured to guide a movement of the movable magnet.

Furthermore, the camera lens module in accordance with an embodiment ofthe present invention further includes a magnet transfer housing onwhich the movable magnet is mounted. The magnet transfer housing isconfigured in a flat plate form and disposed to move over the coil alongwith the movable magnet with a gap by a rolling operation of the guides.

BRIEF DESCRIPTION OF THE DRAWINGS

The aforementioned and other aspects, characteristics, and advantages ofembodiments of the present invention will become evident from thefollowing description taken along with the accompanying drawings.

FIG. 1 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a firstembodiment of the present invention;

FIG. 2 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a secondembodiment of the present invention;

FIG. 3 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a thirdembodiment of the present invention;

FIG. 4 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a fourthembodiment of the present invention;

FIG. 5 is an exploded perspective view illustrating a camera lens modulein accordance with an embodiment of the present invention;

FIG. 6 is an assembled perspective view illustrating a camera lensmodule in accordance with an embodiment of the present invention;

FIG. 7 is an exploded perspective view illustrating elements of thecamera lens module in accordance with an embodiment of the presentinvention;

FIG. 8 is a front cross-sectional view illustrating the camera lensmodule of FIG. 6;

FIG. 9 is an exploded perspective view illustrating the elements of anoptical element assembly adopted in the camera lens module in accordancewith an embodiment of the present invention;

FIG. 10 is a plan view of a camera lens module in accordance with anembodiment of the present invention;

FIG. 11 is a cross-sectional view taken along line A-A of FIG. 10;

FIG. 12 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 13 is a plan view illustrating the optical element assembly of FIG.8 in a first mode;

FIG. 14 is a plan view illustrating the optical element assembly of FIG.8 in a second mode and is a diagram illustrating the state in which afilter blade has been rotated;

FIG. 15 is an exemplary diagram illustrating the state of a coil,movable magnet, and filter blade in the first mode of FIG. 13;

FIG. 16 is an exemplary diagram illustrating the state of the coil,movable magnet, and filter blade in the second mode of FIG. 13;

FIG. 17 is an enlarged perspective view of the filter blade on which amulti-filter in accordance with an embodiment of the present inventionhas been mounted;

FIG. 18 is a cross-sectional view schematically illustrating thedisposition of a proximity sensor in accordance with an embodiment ofthe present invention;

FIG. 19 is a cross-sectional view schematically illustrating thedisposition of a single yoke in accordance with an embodiment of thepresent invention;

FIG. 20 is a cross-sectional view schematically illustrating thedisposition of yokes and guides in accordance with another embodiment ofthe present invention; and

FIG. 21 is a cross-sectional view schematically illustrating thedisposition of yokes and guides in accordance with yet anotherembodiment of the present invention.

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present invention aredescribed in detail with reference to contents described in theaccompanying drawings. However, the present invention is not limited toor restricted by the exemplary embodiments. The same reference numeralsuggested in each drawing denotes an element having substantially thesame function.

Terms including ordinal numbers, such as the first and the second, maybe used to describe various elements, but the elements are notrestricted by the terms. The terms are used to only distinguish oneelement from the other element. For example, in various embodiments ofthe present invention, a first element may be named a second element.Likewise, a second element may be named a first element. The terms usedin this application have been used to only describe specific embodimentsand are not intended to restrict the present invention. An expression ofthe singular number includes an expression of the plural number unlessclearly defined otherwise in the context.

Furthermore, in describing embodiments of the present invention, a term“substantially” does not mean that a cited characteristic, parameter, orvalue must be accurately achieved and may be generated to the extentthat an effect to be provided by a deviation, change, or characteristic,including a tolerance, an error of measurement, an accuracy limit inmeasurement, and other factors known to those skilled in the art, is notexcluded.

The disposition of driving units mounted on a camera lens module inaccordance with embodiments of the present invention is described belowwith reference to FIGS. 1 to 3. In describing an embodiment of thepresent invention, a three-dimensional X/Y/Z coordinate system has beenillustrated. In this case, a “Z axis” means a direction perpendicular tothe camera lens module and the direction of an optical axis in which alens barrel moves. An “X axis” means a direction horizontal to thecamera lens module (i.e., a direction perpendicular to the opticalaxis), and a “Y axis” means a direction vertical to the camera lensmodule (i.e., a direction vertical to the optical axis and perpendicularto the X axis).

Furthermore, a mobile communication terminal on which a camera lensmodule in accordance with an embodiment of the present invention ismounted is only a common term. An embodiment of the present inventionmay also be applied to any one of a mobile phone, a palm-sized personalcomputer (PC), a personal communication system (PSC), a personal digitalassistant (PDA), a hand-held PC (HPC), a smart phone, a local areanetwork (LAN) terminal, a laptop computer, and a tablet PC. Accordingly,the term “mobile communication terminal” is not intended to limit theapplication of the present invention to any device of a specific type.Since a camera lens module in accordance with an embodiment of thepresent invention is advantageous for a small size, it may be properlymounted on a mobile communication terminal that belongs to mobilecommunication terminals and that can be easily held in one hand, such asa smart phone.

Driving units mounted on a camera lens module in accordance with variousembodiments of the present invention may include an auto-focusingdriving unit, an optical image stabilizer driving unit, and an opticalelement driving unit selectively or in combination. For example, onlythe auto-focusing driving unit may be mounted on the camera lens module,only the auto-focusing driving unit and the optical image stabilizerdriving unit may be mounted on the camera lens module, or all of theauto-focusing driving unit, the optical image correction unit, and theoptical element driving unit may be mounted on the camera lens moduledepending on performance of the camera lens module.

Furthermore, one or a plurality of the auto-focusing driving units maybe mounted on the camera lens module, one or a plurality of the opticalimage stabilizer driving units may be mounted on the camera lens module,and one or a plurality of the optical element driving units may bemounted on the camera lens module.

All of the driving units may be mounted on a camera lens module inaccordance with various embodiments of the present invention dependingon performance of the camera lens module. For a reason of a reduction insize, the auto-focusing driving unit is essentially mounted on thecamera lens module, but the optical image stabilizer driving unit or theoptical element driving unit may be selectively mounted on the cameralens module through a selective combination with the auto-focusingdriving unit. The auto-focusing driving unit, the optical imagestabilizer driving unit, and the optical element driving unit areefficiently disposed in empty spaces on the basis of a lens barrel thatmoves in the optical axis of the camera lens module.

FIG. 1 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a firstembodiment of the present invention. The disposition of the drivingunits of the camera lens module in accordance with the first embodimentof the present invention is described below with reference to FIG. 1.

The camera lens module includes a base 10, an auto-focusing driving unit11, and an optical element driving unit 12. The base 10 may have apolyhedron shape, approximately a rectangular shape. The base 10includes a top surface, a bottom surface, and 4 side surfaces. The fourside surfaces hereinafter refer to a first side surface 101, a secondside surface 102, a third side surface 103, and a fourth side surface104. The first side surface 101 is disposed to face the second sidesurface 102 in parallel to the second side surface 102 and disposed toneighbor the third and the fourth side surfaces 103, 104 in a directionperpendicular to the third and the fourth side surfaces 103, 104. Thesecond side surface 102 is disposed to face the first side surface 101in parallel to the first side surface 101 and disposed to neighbor thethird and the fourth side surfaces 103, 104 in a direction perpendicularto the third and the fourth side surfaces 103, 104. The third sidesurface 103 is disposed to face the fourth side surface 104 in parallelto the fourth side surface 104 and disposed to neighbor the first andthe second side surfaces 101, 102 in a direction perpendicular to thefirst and the second side surfaces 101, 102. The fourth side surface 104is disposed to face the third side surface 103 in parallel to the thirdside surface 103 and disposed to neighbor the first and the second sidesurfaces 101, 102 in a direction perpendicular to the first and thesecond side surfaces 101, 102.

A lens barrel 15 moving in the direction of the optical axis is placedat the center of the base 10. The lens barrel 15 is moved in thedirection of the optical axis by the driving of the auto-focusingdriving unit 11, so a focal distance from an image sensor (notillustrated) is controlled. Furthermore, the lens barrel 15 can improvea camera function because a lens (not illustrated) is open or closed ora filter having an additional function is placed on the lens by thedriving of the optical element driving unit 12.

As illustrated in FIG. 1, in the camera lens module in accordance withthe first embodiment of the present invention, the auto-focusing drivingunit 11 is disposed in parallel to the first side surface of the base101, and the optical element driving unit 12 is disposed in parallel tothe second side surface 102 in a direction opposite the first sidesurface 101. As will be described later, the optical element drivingunit 12 may be disposed on one side surface of the base 10 because ithas an approximately slim and flat shape having a specific thickness andhas a rectangular shape. As will be described later, the optical elementdriving unit 12 is described below by taking a filter as an example.

The auto-focusing driving unit 11 faces the lens barrel 15, and theoptical element driving unit 12 also faces the auto-focusing drivingunit 11 with the lens barrel 15 interposed therebetween. Furthermore,the auto-focusing driving unit 11 and the optical element driving unit12 are disposed to face each other. A single auto-focusing driving unit11 is disposed, and a single optical element driving unit 12 isdisposed.

A single optical image stabilizer driving unit may be disposed insteadof the optical element driving unit 12. That is, one or two opticalimage stabilizer driving units may be disposed at the location of theoptical element driving unit 12 in parallel to the second side surface102 after removing the optical element driving unit 12.

The auto-focusing driving unit 11 is disposed to stand upright in thedirection of the optical axis, and the optical element driving unit 12is disposed to stand upright in the direction of the optical axis. C1denotes the center of the optical axis.

FIG. 2 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a secondembodiment of the present invention. The disposition of the drivingunits of the camera lens module in accordance with the second embodimentof the present invention is described below with reference to FIG. 2.

As illustrated in FIG. 2, the camera lens module includes a base 20, anauto-focusing driving unit 21, an optical element driving unit 22, andoptical image stabilizer driving units 23, 24. The base 20 has apolyhedron shape, approximately a rectangular shape. The base 20includes a top surface, a bottom surface, and four side surfaces. Thefour side surfaces include a first side surface 201, a second sidesurface 202, a third side surface 203, and a fourth side surface 204.The first side surface 201 is disposed in a direction perpendicular tothe second side surface 202. The third side surface 203 is disposed in adirection perpendicular to the fourth side surface 204. The first sidesurface 201 stands opposite to the third side surface 203 and the secondside surface 202 stands opposite to the fourth side surface 204, on thebasis of an optical axis.

In the camera lens module of the second embodiment, the auto-focusingdriving unit 21 is disposed in parallel to the first side surface 201 ofthe base 20, and the optical element driving unit 22 is disposed inparallel to the second side surface 202 disposed in the directionperpendicular to the first side surface 201. The auto-focusing drivingunit 21 faces a lens barrel 25. Furthermore, the auto-focusing drivingunit 21 and the optical element driving unit 22 are adjacently disposedso that they are perpendicular to each other.

A single auto-focusing driving unit 21 is disposed, and a single opticalelement driving unit 22 is also disposed. Furthermore, in the cameralens module, the first and the second optical image stabilizer drivingunits 23, 24 may be respectively disposed in parallel to the third andthe fourth side surfaces 203, 204 that stand opposite to the first andthe second side surfaces 201, 202.

Alternatively, a single optical image stabilizer driving unit may bedisposed in parallel to any one of the third and the fourth sidesurfaces 203, 204 of the base 20. In other words, in the camera lensmodule, only the first optical image stabilizer driving unit 23 may bedisposed, but the second optical image stabilizer driving unit 24 maynot be disposed or only the second optical image stabilizer driving unit24 may be disposed, but the first optical image stabilizer driving unit23 may not be disposed.

In a modified embodiment of the present invention, a single opticalimage stabilizer driving unit may be disposed at the location of theauto-focusing driving unit 21 instead of the auto-focusing driving unit21, and one or two auto-focusing driving units may be disposed at thelocations of the one or two optical image stabilizer driving units 23,24 instead of the one or two optical image stabilizer driving units 23,24. That is, the single optical image stabilizer driving unit may bedisposed in parallel to the first side surface 201, a firstauto-focusing driving unit may be disposed in parallel to the third sidesurface 203, and a second auto-focusing driving unit may be may bedisposed in parallel to the fourth side surface 204. The auto-focusingdriving unit 21, the optical image stabilizer driving units 23, 24, andthe optical element driving unit 22 are disposed to stand upright in thedirection of the optical axis. C1 denotes the center of the opticalaxis.

FIG. 3 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a thirdembodiment of the present invention. The disposition of the drivingunits of the camera lens module in accordance with the third embodimentof the present invention is described below with reference to FIG. 3.

As illustrated in FIG. 3, the camera lens module in accordance with thethird embodiment of the present invention may include a base 30, anauto-focusing control unit 31 disposed in the base 30, and an opticalelement driving unit 32. The base 30 includes four corner areas, thatis, empty spaces. The four corner areas hereinafter include a firstcorner area 301, a second corner area 302, a third corner area 303, anda fourth corner area 304. The first corner area 301 is disposed to facethe second corner area 302 in a diagonal direction, disposed to neighborthe third and the fourth corner areas 303, 304, and disposed in adirection perpendicular to the third and the fourth corner areas 303,304 on the basis of an optical axis. The second corner area 302 isdisposed to face the first corner area 301 in a diagonal direction,disposed to neighbor the third and the fourth corner areas 303, 304, anddisposed in a direction perpendicular to the third and the fourth cornerareas 303, 304 on the basis of the optical axis. The third corner area303 is disposed to face the fourth corner area 304 in a diagonaldirection, disposed to neighbor the first and the second corner areas301, 302, and disposed in a direction perpendicular to the first and thesecond corner areas 301, 302 at the center C1 of the optical axis. Thefourth corner area 304 is disposed to face the third corner area 303 ina diagonal direction, disposed to neighbor the first and the secondcorner areas 301, 302, and disposed in a direction perpendicular to thefirst and the second corner areas 301, 302 at the center C1 of theoptical axis.

In the camera lens module of the third embodiment, the auto-focusingdriving unit 31 is disposed in the first corner area 301 of the base 30,and the optical element driving unit 32 is disposed in the second cornerarea 302 of the base 30 that is diagonally disposed in the oppositedirection of the first corner area 301. The auto-focusing driving unit31 is disposed to face a lens barrel 35, and the optical element drivingunit 32 is also disposed to face the lens barrel 35. Furthermore, theauto-focusing driving unit faces the optical element driving unit 32with the lens barrel 35 interposed therebetween in a diagonal direction.Furthermore, the auto-focusing driving unit 31 and the optical elementdriving unit 32 are disposed to stand opposite to each other. A singleauto-focusing driving unit 31 is disposed, and a single optical elementdriving unit 32 is also disposed.

FIG. 4 is a plan view schematically illustrating the disposition of thedriving units of a camera lens module in accordance with a fourthembodiment of the present invention. The disposition of the drivingunits of the camera lens module in accordance with the fourth embodimentof the present invention is described below with reference to FIG. 4.

As illustrated in FIG. 4, the camera lens module in accordance with thefourth embodiment of the present invention may include a base 30-1, anauto-focusing control unit 31-1 disposed in the base 30-1, an opticalelement driving unit 32-1, and first and second optical image stabilizerdriving units 33-1, 34-1. The base 30-1 includes corner areas, that is,four empty spaces. The four corner areas include a first corner area301-1, a second corner area 302-1, a third corner area 303-1, and afourth corner area 304-1. The first corner area 301-1 is disposed in adirection perpendicular to the second corner area 302-1. The thirdcorner area 303-1 is disposed in a direction perpendicular to the fourthcorner area 304-1. The first corner area 301-1 stands opposite to thethird corner area 303-1 in a diagonal direction and the second cornerarea 302-1 stands opposite to the fourth corner area 304-1 in a diagonaldirection, on the basis of an optical axis.

In the camera lens module, the auto-focusing driving unit 31-1 isdisposed in the first corner area 301-1 of the base 30-1, and theoptical element driving unit 32-1 is disposed in the second corner area302-1 disposed in the direction perpendicular to the first corner area301-1. The auto-focusing driving unit 31-1 faces a lens barrel 35, andthe optical element driving unit 32-1 also faces the lens barrel 35.Furthermore, the auto-focusing driving unit 31-1 is adjacent to theoptical element driving unit 32-1 in a perpendicular direction. A singleauto-focusing driving unit 31-1 is disposed, and a single opticalelement driving unit 32-1 is also disposed.

Furthermore, in the camera lens module of the fourth embodiment, thefirst and the second optical image stabilizer driving units 33-1, 34-1may be disposed in the third and the fourth corner areas 303-1, 304-1that respectively stand opposite to the first and the second cornerareas 301-1, 302-1. The first and the second optical image stabilizerdriving units 33-1, 34-1 are disposed to face the lens barrel 35 andarea adjacent to each other in a perpendicular direction.

Alternatively, only one optical image stabilizer driving unit may bedisposed in any one of the third and the fourth corner areas 303-1,304-1 of the base 30-1. In other words, in the camera lens module of thefourth embodiment, only the first optical image stabilizer driving unitis disposed in the third corner area 303-1 and the second optical imagestabilizer driving unit may not be disposed, or only the second opticalimage stabilizer driving unit is disposed in the fourth corner area304-1 and the first optical image stabilizer driving unit may not bedisposed in the third corner area 303-1.

In a modified embodiment of the present invention, in the camera lensmodule, an optical image stabilizer driving unit may be disposed insteadof the auto-focusing driving unit 31-1, and first and secondauto-focusing driving units may be disposed instead of the first and thesecond optical image stabilizer driving units 33-1, 34-1. That is, theauto-focusing driving unit 31-1 and the first and the second opticalimage stabilizer driving units 33-1, 34-1 may be respectivelysubstituted with the optical image stabilizer driving unit and the firstand the second auto-focusing driving unit.

The auto-focusing driving unit 31-1 is disposed to stand upright in thedirection of the optical axis. The first and the second optical imagestabilizer driving units 33-1, 34-1 are also disposed to stand uprightin the direction of the optical axis. The optical element driving unit32-1 is disposed to stand upright in the direction of the optical axis.

The disposition of the driving units of the camera lens modules inaccordance with some embodiments of the present invention has beendescribed by taking into consideration a reduction in the size. Anoptical element assembly including an optical element driving unitmounted on a camera lens assembly in accordance with embodiments of thepresent invention is described below with reference to some drawings.

The configuration of a camera lens assembly 60 in accordance with anembodiment of the present invention is described below with reference toFIGS. 5 to 17.

As illustrated in FIGS. 5 to 8, the camera lens assembly 60 may includean auto-focusing assembly 40 and an optical element assembly 50 coupledto the auto-focusing assembly 40. The optical element assembly 50 iscoupled to the auto-focusing assembly 40 on the basis of the center ofan optical axis, thereby completing the camera lens module 60 of FIG. 5.The auto-focusing assembly 40 is named because an auto-focusing drivingunit (not illustrated) is installed on the other side surface 410 of thebase 41. If an optical image stabilizer driving unit (not illustrated)is installed on the other side surface 410 of the base 41, theauto-focusing assembly 40 may be denoted as an optical image stabilizerassembly.

Furthermore, an auto-focusing driving unit may be mounted on the otherside surface 410 of the auto-focusing assembly 40, and optical imagestabilizer driving units may be disposed in spaces within front and rearside surfaces 412, 414.

The assembly of the modules of the camera lens module 60 is completed bycoupling between the base 41 of the auto-focusing assembly 40 and thebase 51 of the optical element assembly 50. A filter cover 52 is coupledto the top surface of the camera lens assembly 60. A coupling pin to bedescribed later is exposed to some edge of the filter cover 52. A lensbarrel 42 is moved in the direction of the optical axis by anauto-focusing driving unit (not illustrated), so the focal distancebetween a lens and an image sensor (illustrated in FIG. 6) iscontrolled.

The configuration of the optical element assembly 50 in accordance withan embodiment of the present invention is described below with referenceto FIGS. 9 to 12. The optical element assembly 50 is disposed inparallel to one or a plurality of one side surfaces within a camera lensmodule as already described above. The optical element driving unit ofthe optical element assembly 50 may be disposed to face any one sidesurface not in the corner area of the camera lens module because it hasan approximately flat-plate shape (i.e., a rectangular flat shape havinga specific thickness). Furthermore, an auto-focusing driving unit (notillustrated) may be installed on the other side surface opposite oneside surface in which the optical element driving unit has beeninstalled.

The optical element assembly 50 includes an optical element base 51, theoptical element driving unit, and an optical element unit. The opticalelement may be a filter. The optical element base 51 is a basic supportcoupled to an auto-focusing base. The optical element driving unit andthe optical element unit are disposed in the optical element base 51.The optical element driving unit is mounted on the optical element base51 in such a way as to stand upright in the direction of an opticalaxis. The optical element unit is disposed in parallel to the topsurface of the optical element base 51 and mounted in such a way as tobe rotated. An opening 516 having a specific diameter is formed in thetop surface of the optical element base 51. The opening 516 is a spacewhere the lens barrel is placed.

The optical element driving unit is mounted on one side surface of theoptical element base in parallel to one side surface of the camera lensmodule, and provides a force that drives the optical element unit. Thatis, the optical element driving unit is mounted so that it operates inconjunction with the optical element unit, thus providing a force thatrotates the optical element unit around a hinge h.

The optical element driving unit includes yokes y1, y2, a coil C, amovable magnet m, and guides g1, g2. The optical element driving unitfunctions to provide a force that rotates the optical element unit usingan electromagnetic force generated between the coil C and the movablemagnet m. When the movable magnet m is reciprocated left and right inresponse to the electric current of the coil C, the optical elementdriving unit rotates the optical element unit. The coil C is a stator,and the movable magnet m is a rotor. The optical element driving unit isa driving source mounted on one side surface of the camera lens modulein such a way as to stand upright in the direction of the optical axisand configured to provide a force for moving the optical element unitdisposed in parallel to the top surface of the optical element base 51,that is, disposed in parallel to a surface perpendicular to the opticalaxis (i.e., an X-Y plane).

The optical element base 51 is a stator, and has the yokes y1, y2, thecoil C, and the guides g1, b1; g2, b2 mounted on one side surfacethereof. A coil seating unit 510 having the center recessed is placed onthe one side surface of the optical element base 51. Guides seatingunits 512, 514 are disposed on both sides of the coil seating unit 510.One (illustrated in FIG. 19) or a plurality of yokes y1, y2 is disposedon the bottom surface of the coil seating unit 510.

The yokes y1, y2 may be made of a magnetic materials and a metalmaterial in order to provide an attractive force with the movable magnetm. The yokes include first and second yokes y1, y2 that are symmetricalto each other on the bottom surface of the coil seating unit 510,disposed to face the movable magnet m, and disposed in parallel. Thefirst yoke y1 has a longish rectangular shape having a thickness, and isdisposed on the bottom surface of the coil seating unit 510 in such away as to extend in the direction of the optical axis. The second yokey2 has the same shape as the first yoke y1, and is disposed to besymmetrical to the first yoke y1 next to the first yoke y1 in such a wayas to extend in the direction of the optical axis.

The guide seating units 512, 514 are formed in the optical element base51. The first and the second guides g1, b1; g2, b2 are respectivelyinstalled in the guide seating units 512, 514. The first and the secondguides g1, b1; g2, b2 are mounted for a smooth movement of a magnettransfer housing 55 to be described later. In particular, when the firstand the second guides g1, b1; g2, b2 are closely attached to the magnettransfer housing 55, they function as bearings and support a smoothmovement of the magnet transfer housing 55. The magnet transfer housing55 performs a rolling operation by the first and the second guides g1,b1; g2, b2.

The guides include the first and the second guides g1, b1; g2, b2 onboth sides of the first and the second yokes y1, y2 or on both sides ofthe coil C. The first and the second guides g1, b1; g2, b2 support themagnet transfer housing 55. A pair of the first guides g1, b1 areconfigured and placed in the guide seating unit 512 on upper and lowersides thereof. The second guides g2, b2 are disposed symmetrically tothe first guides g1, b1 on the basis of the coil C and disposed in theguide seating unit 514. The first and the second guides includerespective ball bearings b1, b2. The ball bearings b1, b2 support therolling operation of the magnet transfer housing 55.

The movable magnet m has an approximately rectangular shape having athickness and a flat plate shape. The movable magnet m is safelyaccommodated in the magnet transfer housing 55 a. The movable magnet mlinearly reciprocates left and right (i.e., in the X-axis direction) anddrives the optical element unit while maintaining a specific distancefrom the coil C through cooperation with the coil C. The distancebetween the coil C and the movable magnet m is maintained by the ballbearings b1, b2.

The magnet transfer housing 55 is a flat plate-shaped housing foraccommodating the movable magnet m. The magnet transfer housing 55 movesin parallel on the coil C in the state in which the movable magnet m hasbeen included in the magnet transfer housing 55. The magnet transferhousing 55 moves through a rolling operation in the state in which ithas a direct contact with the ball bearings b1, b2 and linearly movesleft and right (i.e., in the X-axis direction).

A coupling pin 550 coupled to the optical element unit is provided atthe top corner of the magnet transfer housing 55 on one side thereof.When the magnet transfer housing 55 moves, the optical element unitperforms a rotary motion around the hinge h in conjunction with thecoupling pin 550. P denotes a printed circuit board (PCB) or flexibleprinted circuit board (FPCB) for electrically connecting the coil C toan external power source.

As illustrated in FIGS. 10 to 12, the coil C, the movable magnet m, andthe magnet transfer housing 55 are mounted on one side surface of theoptical element base 51. A specific gap is present between the movablemagnet m and the magnet transfer housing 55, and the exterior of thecoil C. The gap is provided by the ball bearings b1, b2. Furthermore, anattractive force between the magnet transfer housing 55 and the yokesy1, y2 is made possible because the yokes are made of a magnetic ormetallic material. The reciprocation of the magnet transfer housing 55in the X-axis direction is caused by an electromagnetic force generatedwhen an electric current is applied to the coil C. The movable magnet mmay be one-sidedly disposed on one side of the coil C and may beone-sidedly disposed on the other side of the coil C depending onwhether a (+) pole or a (−) pole is applied to the coil C.

The driving of the optical element assembly is described below withreference to FIGS. 13 to 16. In the first mode of the camera lensmodule, the first filter 530 of a filter blade 53 is disposed at thecenter of the optical axis. That is, the first filter 530 is placed onthe lens of a lens barrel (not illustrated). Such a state is illustratedin FIGS. 13 and 15. The movable magnet m is one-sidedly placed slightlyto the left on the basis of the coil C.

When the first mode switches to a second mode, the direction of anelectric current applied to the coil C is reversed, and thus the movablemagnet m linearly moves to the right. Next, the filter blade 53 coupledto a coupling pin 550 is counterclockwise rotated, so the second filter532 is disposed at the center of the optical axis. That is, the secondfilter 532 is placed on the lens of the lens barrel (not illustrated).

As a result, when the movable magnet m linearly moves, the coupling pin550 also linearly moves, but the filter blade 53 rotates around thehinge h. Accordingly, the first filter 530 or the second filter 532 isplaced at the center of the optical axis depending on the first orsecond mode.

An optical element that forms the optical element unit in accordancewith an embodiment of the present invention, that is, the filter blade53, is described below with reference to FIG. 17. The filter blade 53may be called a multi-filter because it includes the two first and thesecond filters 530 and 532. Furthermore, any one of the first filter 530and the second filter 532 may be deleted, and the deleted filter may beresponsible for a shutter. Furthermore, the filter blade 53 may includeat least three optical filters. The first and the second filters 530 and532 are provided in specific areas of the filter blade and disposed inparallel.

The first filter 530 may be formed of a visible ray filter, and thesecond filter 532 may be formed of an infrared filter. Alternatively,the first and the second filters 530 and 532 may be configured invarious ways depending on a photographing mode. For example, variousoptical filters may be used instead of the first filter 530 or thesecond filter 532. For example, the optical filters may include abandpass filter, an ND filter, a PL filter, and a color filter.Furthermore, the filter blade 53 may include various lenses havingoptical zoom-in/out functions instead of the optical filter.

If the first filter 530 is formed of a visible ray cut-off filter anddisposed at the center of the optical axis, the camera lens module maybe applied to a common mode. If the second filter 532 is formed of aninfrared (IR) band-pass filter and disposed at the center of the opticalaxis, the camera lens module may be applied to a security orauthentication mode because the iris can be recognized. A first opening531 into which the coupling pin is inserted is provided in an area ofthe filter blade 53 on one side thereof. A second opening 533 to whichthe hinge is coupled is provided in the filter blade 53. The firstopening 531 is lengthily formed, so the coupling pin moves within thefirst opening 531.

Referring to FIG. 18, an optical element assembly in accordance with anembodiment of the present invention may further include a positionsensor. A position sensor S1 may be disposed in the internal space ofthe coil C or a position sensor S2 may be disposed near the coil C onthe board P on which the coil C has been mounted. Each of the positionsensors S1 and S2 may detect the location of the movable magnet andoutput a detection signal. The position sensor S1 disposed within thecoil C or the position sensor S2 disposed near the coil C may be used bytaking into consideration a mounting space.

Referring to FIG. 19, a yoke in accordance with an embodiment of thepresent invention may include a single yoke y3. The single yoke y3 maybe provided in the optical element base 51 in such a way as to standupright in the direction of the optical axis. The single yoke y3 may bedisposed at the bottom of the board P including the coil C in such a wayas to be depressed.

Referring to FIGS. 20 and 21, first and second yokes y4, y5 inaccordance with an embodiment of the present invention may be providedin the guide seating surfaces 512, 514 of the optical element base 51not in the coil seating surfaces of the optical element base 51.Furthermore, the first and the second yokes y4, y5, together with ballbearings b4, b5, may be provided in the guide seating surfaces 512, 514.The first yoke y4 and the first ball bearing b4 may be disposed on oneside of the coil C, and the second yoke y5 and the second ball bearingb5 may be disposed on the other side of the coil C.

Furthermore, the first and the second yokes y4, y5 may be respectivelydisposed inside the first and the second ball bearings b4, b5. Such adisposition state of the first and the second yokes y4, y5 isillustrated in FIG. 20. Furthermore, the first and the second yokes y6,y7 may be respectively disposed outside the first and the second ballbearings b6 and b7. Such a disposition state of the first and the secondyokes y6, y7 is illustrated in FIG. 21. The inside refers to a directionthat becomes close to the coil C, and the outside refers to a directionthat becomes distant from the coil C.

Referring back to FIG. 9, the elements of the optical element drivingunit are seated in one side surface of the optical element base 51 by anouter block side cover 56. The outer block side cover 56 is configuredto have a length enough to accommodate the moving distance of the magnettransfer housing 55. The elements of the optical element unit are safelyseated on the top surface of the optical element base 51 by the filtercover 52. Furthermore, the filter blade 53 performs a safe rotarymovement on the top surface of the optical element base 51 by a filterguide plate 54 without intervention.

As described above, the camera lens module in accordance with anembodiment of the present invention is advantageous for a small-sizedesign because the optical element driving unit is configured to have anapproximately flat plate shape, mounted to face one side surface of thecamera lens module, and disposed to face the auto-focusing control unitor the optical image stabilizer driving unit.

Furthermore, the camera lens module in accordance with an embodiment ofthe present invention is advantageous for a small-size design becausethe optical element driving unit is configured to have an approximatelyflat plate shape, disposed in a corner area of the camera lens module insuch a way as to face the lens barrel, and disposed to face theauto-focusing control unit or the optical image stabilizer driving unit.

Furthermore, the camera lens module in accordance with an embodiment ofthe present invention is convenient in various photographing modebecause it includes the multi-filter and is effective in mobile phonesecurity authentication because it can recognize the iris.

Although the embodiments of the present invention have been illustratedand described, those skilled in the art will understand that the presentinvention may be modified in various ways in its form and detailswithout departing from the spirit and scope of embodiments, such as theattached claims and those defined by their equivalents.

The invention claimed is:
 1. A camera filter module, comprising: a base;one or a plurality of yokes mounted on one side surface of the base; acoil mounted on the one lateral side of the base and disposed to facethe yoke; a flat plate-shaped movable magnet disposed in parallel to thecoil in such a way as to face the coil and disposed to linearly moveover the coil and to linearly move along the one lateral side surface ofthe base in a direction perpendicular to a direction of an optical axiswhen an electric current is applied to the coil; a plurality of guidesincluding ball bearings and provided between the movable magnet and thecoil and configured to guide a movement of the movable magnet; and anoptical element unit disposed on an upper surface of the base to be inperpendicular to the flat plate-shaped movable magnet, wherein theoptical element unit is configured to perform a rotary motion inconjunction with the flat plate-shaped movable magnet's moving in thedirection perpendicular to the direction of the optical axis.
 2. Thecamera filter module of claim 1, further comprises a magnet transferhousing on which the movable magnet is mounted, wherein the magnettransfer housing is configured in a flat plate form, wherein the magnettransfer housing is further configured to move over the coil along withthe movable magnet with a gap by a rolling operation of the ballbearing, wherein the magnet transfer housing is further configured tomove over the guides in the direction perpendicular to the direction ofthe optical axis, wherein the magnet transfer housing is furtherconfigured to linearly move along the one lateral side of the base, andwherein the optical element unit is further configured to perform therotary motion around a hinge in conjunction with the magnet transferhousing's moving in the direction perpendicular to the direction of theoptical axis.
 3. The camera filter module of claim 2, further comprisesa coupling pin extended in the direction of the optical axis in a topcorner of the magnet transfer housing, wherein the optical element unitis a filter blade having one or a plurality of filters, and wherein theoptical element unit is further configured to perform the rotary motionaround the hinge in conjunction with the coupling pin's moving in thedirection perpendicular to the direction of the optical axis.